arkei | 965dffc8c73d88f296086b5c6324b2be6ef9cd5041d6d7822370f2a04dc1538b

Analysis

max time kernel
100s
max time network
135s
platform
windows7_x64
resource
win7-20220414-en
submitted
17-06-2022 07:04

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General

Target

2c087bb64cb5b12444c5ad9e20f46822.exe
Size

288KB
MD5

2c087bb64cb5b12444c5ad9e20f46822
SHA1

3c7f3b016a684ca9c61c0ef43cf229d9e48de305
SHA256

965dffc8c73d88f296086b5c6324b2be6ef9cd5041d6d7822370f2a04dc1538b
SHA512

e32e97190f0c167546ae98a21b25a4e42da3e8168c89c40ae8c390aff88324fdf6e8960d1afc51ff7d9f6da9538471249a6d748ca11df035fb2d3ac7bdaa1688

Score

10^/10

arkei default discovery spyware stealer suricata

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)
suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)
suricata
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

urs.0.exe

pid process

1996 urs.0.exe

pid	process
1996	urs.0.exe

Loads dropped DLL 8 IoCs

Processes:

2c087bb64cb5b12444c5ad9e20f46822.exeurs.0.exe

pid	process
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1000	2c087bb64cb5b12444c5ad9e20f46822.exe
1996	urs.0.exe
1996	urs.0.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

urs.0.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	urs.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	urs.0.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1760 timeout.exe

pid	process
1760	timeout.exe

Modifies Internet Explorer settings 1 TTPs 34 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 70ba614d2982d801	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "362221623"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{70F0FFA1-EE1C-11EC-B7F1-DEAEF166B17F} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c00000000000000010000000083ffff0083ffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000962422cf799f2f46a7e75b376cef3c3c0000000002000000000010660000000100002000000068752f089b53e5c7aafa32ae8617d152b051ef26004b01bdad8cf416d2a22064000000000e8000000002000020000000eac66c5d1ad19b40e06cdacf80f407291229b85e06c1748bbb5fb62d791c372f2000000028d94b68f36f60f1484c9453171d930e4ed1eac5b943969b4b9d17dcaeb71f9240000000e744cc6306384104481bfa4ac87fec0b80ff80e3bb92ce12ab0e1bf35d702ec5e7463f4683f9c219666214fedddcc9ccdb19b2f35b3d371a3d56b5896409b69d	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1632 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1632 iexplore.exe
1632 iexplore.exe
752 IEXPLORE.EXE
752 IEXPLORE.EXE
752 IEXPLORE.EXE
752 IEXPLORE.EXE

pid	process
1632	iexplore.exe

pid	process
1632	iexplore.exe
1632	iexplore.exe
752	IEXPLORE.EXE
752	IEXPLORE.EXE
752	IEXPLORE.EXE
752	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

2c087bb64cb5b12444c5ad9e20f46822.exeiexplore.exeurs.0.execmd.exe

description	pid	process	target process
PID 1000 wrote to memory of 1996	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	urs.0.exe
PID 1000 wrote to memory of 1996	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	urs.0.exe
PID 1000 wrote to memory of 1996	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	urs.0.exe
PID 1000 wrote to memory of 1996	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	urs.0.exe
PID 1000 wrote to memory of 1632	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	iexplore.exe
PID 1000 wrote to memory of 1632	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	iexplore.exe
PID 1000 wrote to memory of 1632	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	iexplore.exe
PID 1000 wrote to memory of 1632	1000	2c087bb64cb5b12444c5ad9e20f46822.exe	iexplore.exe
PID 1632 wrote to memory of 752	1632	iexplore.exe	IEXPLORE.EXE
PID 1632 wrote to memory of 752	1632	iexplore.exe	IEXPLORE.EXE
PID 1632 wrote to memory of 752	1632	iexplore.exe	IEXPLORE.EXE
PID 1632 wrote to memory of 752	1632	iexplore.exe	IEXPLORE.EXE
PID 1996 wrote to memory of 1984	1996	urs.0.exe	cmd.exe
PID 1996 wrote to memory of 1984	1996	urs.0.exe	cmd.exe
PID 1996 wrote to memory of 1984	1996	urs.0.exe	cmd.exe
PID 1996 wrote to memory of 1984	1996	urs.0.exe	cmd.exe
PID 1984 wrote to memory of 1760	1984	cmd.exe	timeout.exe
PID 1984 wrote to memory of 1760	1984	cmd.exe	timeout.exe
PID 1984 wrote to memory of 1760	1984	cmd.exe	timeout.exe
PID 1984 wrote to memory of 1760	1984	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\2c087bb64cb5b12444c5ad9e20f46822.exe
"C:\Users\Admin\AppData\Local\Temp\2c087bb64cb5b12444c5ad9e20f46822.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1000

C:\Users\Admin\AppData\Local\Temp\urs.0.exe
"C:\Users\Admin\AppData\Local\Temp\urs.0.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\urs.0.exe" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
4⤵
- Delays execution with timeout.exe
PID:1760

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://yip.su/2N19t7
2⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1632

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1632 CREDAT:275457 /prefetch:2
3⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:752

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
C:\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\O9YNQFFZ.txt
Filesize
604B

MD5
a7179c09eec5d18b79bd97f4730c5450

SHA1
c2dee4d38c1b77904976cea28671ca2d56e1b65d

SHA256
678fb095f32a57b4e5121338355200ee1c5c723882dc23f05863281b7309c2b3

SHA512
3ed7abadfe2eb31d26a1cc7efc771108a9704ef65a86ec923d76931514a20abfd3c12045ed786816f90fe7094dd7cccd1e9a53cdafd0c69e49e6c052fbafbfea

Download Submit
\ProgramData\mozglue.dll
Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll
Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
\Users\Admin\AppData\Local\Temp\urs.0.exe
Filesize
336KB

MD5
dcae989d2c708fa2b73374698b1a8acc

SHA1
5846cc14d013c09c1f86796aba571ee65daa2d7e

SHA256
edfaf15aa4e28a3891b08e7e948f0d08680b492b8ba4ca464ad1b68df0190719

SHA512
4216de9f3641ba425cab752c769117f8c52e0087af09ae0413b2afcc2d82cb77ce1da0c5508cfcfa503de8f8f1c4d0b19fe263b65056b69c4de746874e72a0d1

Download Submit
\Users\Admin\AppData\Local\Temp\urs.1.exe
Filesize
5.3MB

MD5
00e93456aa5bcf9f60f84b0c0760a212

SHA1
6096890893116e75bd46fea0b8c3921ceb33f57d

SHA256
ff3025f9cf19323c5972d14f00f01296d6d7a71547eca7e4016bfd0e1f27b504

SHA512
abd2be819c7d93bd6097155cf84eaf803e3133a7e0ca71f9d9cbc3c65e4e4a26415d2523a36adafdd19b0751e25ea1a99b8d060cad61cdfd1f79adf9cd4b4eca

Download Submit
memory/1000-54-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/1760-91-0x0000000000000000-mapping.dmp

Download
memory/1984-88-0x0000000000000000-mapping.dmp

Download
memory/1996-67-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1996-65-0x0000000000400000-0x0000000000670000-memory.dmp

Filesize
2.4MB

Download
memory/1996-89-0x000000000030E000-0x000000000032F000-memory.dmp

Filesize
132KB

Download
memory/1996-90-0x0000000000400000-0x0000000000670000-memory.dmp

Filesize
2.4MB

Download
memory/1996-64-0x00000000001B0000-0x00000000001D9000-memory.dmp

Filesize
164KB

Download
memory/1996-63-0x000000000030E000-0x000000000032F000-memory.dmp

Filesize
132KB

Download
memory/1996-60-0x0000000000000000-mapping.dmp

Download